Production of double-faced sound-records.



I F; L. GAPPS. PRODUCTION OF DOUBLE FAGED SOUND RECORDS.

APPLICATION FILED AUG. 6, 1908.

941,975. Patented Nov. 30, 1909.

NITED STATES PATENT OFFICE.

FRANK L. CAPPS, OF 'BRIDGEPORT, CONNECTICUT, ASSIGNOR TO AMERICAN GBAPHO- PHONE COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF WEST VIRGINIA.

To all whom it may concern:

Be it known that I, FRANK L. CAPPS, a citizen of the United States of America, and a resident of Bridgeport, Connecticut, have inwmted a new and useful Improvement in the Production of Double-Faced Sound- Records, which improvement is fully set forth in the following specification.

My invention relates to the production of the so-called double-faced disk soundrecords, which are commonly of the zigzag variety, although they may also be of the vertically-undulating type.

The invention will be best understood by reference to the annexed drawings that indi'cate successive steps in producing the record.

In the drawings, Figure 1 represents a steam-table on which matrices are being heated; Fig. 2 represents a work-table, containing (shown in cross-section) two dies, and certain other articles indicated as not quite in final position; Fig. 3 is a similar view of the same at a later stage; Fig. 4 represents the dies with their contents in positionin a press; and Fig. 5 is a cross-section of thefinal article. The thickness of the parts constituting the record is greatly exaggerated in all the drawings, for the sake of clearness. 7

22, each recessed to receive a matrix.

From the center of the recess in one die (as 2) rises a stud or pin 3, while the other die (as 2) has a corresponding central hole 4 that will receive the stud 3 when the .dies are brought face to face.- A paper disk 2 is placed in the bottom of each recess. Two centrally-apertured matrices 55 are heated upon the steam-table 6, and each placed face uppermost upon the paper sheets v.2 in the recess of each die. In'practice, the dies do not require any ap licatlon ofheat other than may be imparte to them (through the paper) by reason of the heated matrices, A centrally-apertured label '(indicated at 7 7) is laid face downward upon the center of each matrix. Upon each label. and matrix is placed a centrally-apertured sheet having a prepared. surface indicated at.8 (8), the prepared surface being next to the matrix. This sheetv is of the exact diameter of the record to be made, and is preferably of ordinary aperr Its (surfacing consists preferably 0 a highgra de composition Specification of Letters Patent.

Application filed August 6, 1908.

PEODUCTION OF DOUBLE-FAGED sOUND -RECORDS.

Patented Nov. 30,1909.

Serial No. 447,281.

'(e. 9., one containing shellac) which has been sprinkled upon the same and made secure by the application of heat (for instance,

as described in the Macdonald & Capps patout, No. 870,569, 'Nov. 12, 1907). This surfacing is indicated at 9-.-9. Next a lump or mass 10, of any convenient thermo-plastic recordmaterial, such as the so-called stock and preferably of cheap or inferior quality, is placed on top of one of the dies (as 8). Then the workman reverses the other die 2 (with its sheet 2, matrix 5, la-

-bel T, and sheet 8), taking pains to' hold in place the contents of the recess. This reversing is indicated by the dotted line and the arrow in Fig. 2. When the two dies with'their contents are brought face to face, with the lump 10 of thermo-plastic material between, the whole is inserted between the plates 11 of a suitable press (Fig. 4), and pressure applied in the usual manner, In about one minute the matrices and record will become sufiiciently chilled to permit taking them out. The fact that the dies were not independently heated, and are therefore comparatively cool, facilitates this.

The resulting article (indicated b -Fig. 5) is a. disk consisting of a flat oentra layer of the material 10, having on each side thereof the sheet 8 (8) with its surfacin 9 (9) of high-grade material, in each 0- which surfaces appears an impressed sound-rec rd, while centrally of each surface is the label.

The two matrices are returned to the steam-.

the dies), yet the dies also may be slightly I warmed, in which case the paper disks '2 may be dispensed with. WVhile I havelike wise referred to the surfacing 9-9 as' of 'high-grade material and the-central mass 10 as of low-grade material, yet this relative distinction in quality is not material to the invention, though, of course, it would be preferable to employ cheaper material for the body or central portion of the record.

' Having thus described my invention, I

1. The herein-describedr process of pro- 1110 ducing double-faced records, which consists, first, in heating two record-matrices; second, placing each matrix face upward within the recess of a die; third, placing a label face downward upon the center of each matrix; fourth, placing. face downward upon each matrix and label a sheet having a surface of high grade record material; fifth, placing upon the back of one of said sheets a mass of thermo-plastic material; sixth, reversing the other die with its contents and locating the same upon top of the thermo-plastic material; and, seventh, inserting the parts thus assembled into a press and applying pres sure.

2. The herein-described process of producing doublefaced sound-records, which consists of applying face downward upon each of two heated record-matrices a label and a sheet surfaced with high-grade material, next bringing the same together with a mass of inferior record-rnaterial interposed, and finally applying pressure.

3. The herein-described process of producing double-faced records, whichconsists of applying face downward upon each of two record-'niatrices a label and a sheet surfaced with hlgh grade material, next bringing the same together with a mass of inferior record-material interposed, and sub-- material, inverting the other of'said dies with its contents andplacing it upon top of said mass, and finally subjecting the parts so assembled to pressure.

5. The process of producing double-faced sound-records, which consists, first, in placing a sheet of paper within the recess of each of two cold dies; second, heating two record-matrices; third, placing each of them face upward upon the sheet of paper within the said recess; fourth,-placing a label face downward upon the center of each matrix; fifth, placing face downward upon each matrix a label and a sheet having a surface of high-grade record-material; sixth,.placing upon the back of one of said sheets a mass of thermoplastic material; seventh, reversing the other die with its contents and locating the same upon top of the said thermo-plastic material; and, eighth, inserting the parts thus assembled into a press and applying pressure.

6. The process of producing double-faced sound-records, which consists of, first, placing a sheet of paper within the recess of each of two cold dies; second, placing therein in the order indicated a matrix face up ward, alabel face downward, and a properlysurfaced sheet face downward; third, placing on one of said sheets a mass of thermoplastic material, and reversing the other die with it's contentsand locating the same upon said mass; 5nd, fourth, subjecting the things between the two matrices to heat and pressure.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

Y FRANK L. (JAll-S.

\Vitnesses:

C. A. L. MAssIn, RALPH L. Soor'r. 

